Improvement in pipe-tongs



waited time JONATHAN DUNLAP DAVIS, or FITGHBURG, MASSACHUSETTS.

Lenen Patent No. 98,747, flared .Tammy 11,1870.

IMPROVEMENT IN PIPE-TCNGS.

The Schedule referred to in these Letters Patent and making parl: of the same.

same to be fully described in the following speciication, and represented in the accompanying drawings, of which- Figures 1 and 2 are side elevations,

Figure 3, a longitudinal section, and

Figure 4, an edge elevation ot' my improved pipetongs. A

In suclidrawing- A denotes the hooked jaw-lever, and B, the tooth jaw-lever, they being arranged, relatively to each other,

in manner as represented.

A slot, A, is made through the tooth jaw-lever, as shown more particularly in Figure 5, which is a side view of it.

The said jaw-lever is also provided with a shoulder-v piece, b, erected on or projected from it, at one extremity of the slot.

A round hole, c, is bored through this shoulder- 4 piece and the contiguous partof the lever, to receive a screw, d, which extends through the said hole, and has a milled nut, e, screwed on it.

The screw d has a" flat head, f, through which a screw-bolt or pivot, g, is extended.

The shank ofthe bolt goes through the slot and the hook jaw-lever, andA receives a nut, h., the head ofthe bolt being shown at i.

Figure 6 is a side view of the bolt or pivot, such pivot being applied to the hook jaw-lever, so as tobe capable Vof freely revolving in it.

,The tooth jaw-lever slides freely on the Vpivot or bolt, in a direction toward the hook l, of the hooked jaw-lever. f

The" milled nut is insulated from each jaw-lever, whereby. the tooth jaw-lever can be moved on the screw, independently ofthe nut, which is not the case in the pipe-tongs described in the United States patent, No. 48,017, as in such tongs the nut is litted into recesses I nad-e in the lever, which is slotted, and consequently the lever cannot be moved without the nut being moved with it. 'lhcse recesses greatly weaken the lever, and render it liable to break while in use.

It will be seen, that in the construction of my pipetongs, I have made a different arrangement of its operative parts, whereby I am not only enabled to adjust the jaws with greater facility, but have dispensed with the said recesses for holding the nut. Furthermore, my pipe-tongs have other important advantages.

I do not claim the pipe-tongs as represented inA the aforesaid pat-ent, nor do I claim the solid screw and fulcrum'as described therein,as I do not use such, as

` to readily insert the screw through the shoulder-piece,

lever is rendered easily movable onV the screw, and,-

while at work, takes a bearing on the nut.

I claim the pipe-tongs, consisting ofthe jaws A and B, lng b, slot a, nut o, and the fulcrum or bolt g, and

nut h, constructed and arranged as described.

Witnesses: JONATHAN DUNLAI) DAVIS.

R. H. EDDY, i J R. SNow. 

